EP 0150006 B1 19860910 - PROCESS FOR THE PREPARATION OF CERTAIN ENANTIOMERIC PAIRS OF THE ALPHA-CYANO-3-PHENOXY-4-FLUORO-BENZYLESTER OF PERMETHRINIC ACID
Title (en)
PROCESS FOR THE PREPARATION OF CERTAIN ENANTIOMERIC PAIRS OF THE ALPHA-CYANO-3-PHENOXY-4-FLUORO-BENZYLESTER OF PERMETHRINIC ACID
Publication
Application
Priority
DE 3401483 A 19840118
Abstract (en)
[origin: US4544508A] A process for the preparation of the enantiomeric pairs (1R-3R- alpha S+1S-3S- alpha R) and (1R-3S- alpha S+1S-3R- alpha R) from a mixture of all 8 stereoisomers of the compound alpha R/S-cyano-3-phenoxy-4-fluorobenzyl 3R/S-(2,2-dichlorovinyl)-2,2-dimethyl-1R/S-cyclopropanecarboxylate, comprising dissolving the mixture in a secondary or tertiary alkylamine having 2-6 C atoms per alkyl radical, subjecting the solution to crystallization whereby the enantiomeric pairs (1R-3R- alpha S+1S-3S- alpha R) and (1R-3S- alpha S+1S-3R- alpha R) crystallize out from the solution, and separating the crystallized material. The crystals are enriched in the most active components.
IPC 1-7
IPC 8 full level
C07B 57/00 (2006.01); A01N 53/08 (2006.01); C07B 31/00 (2006.01); C07C 67/00 (2006.01); C07C 253/00 (2006.01); C07C 253/34 (2006.01); C07C 255/38 (2006.01); C07C 255/39 (2006.01); C07C 255/53 (2006.01); A01N 53/00 (2006.01)
CPC (source: EP KR US)
A01N 53/00 (2013.01 - EP US); C07C 253/34 (2013.01 - KR); C07C 255/34 (2013.01 - KR); C07C 255/53 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0150006 A1 19850731; EP 0150006 B1 19860910; AT E22070 T1 19860915; AU 3776585 A 19850725; AU 565238 B2 19870910; BR 8500212 A 19850827; CA 1249841 A 19890207; CS 253716 B2 19871217; CS 33385 A2 19870514; DD 232037 A5 19860115; DE 3401483 A1 19850725; DE 3560001 D1 19861016; DK 173881 B1 20020128; DK 22885 A 19850719; DK 22885 D0 19850117; ES 539647 A0 19851216; ES 8603385 A1 19851216; GR 850124 B 19850508; HU 193919 B 19871228; HU T39420 A 19860929; IL 74053 A0 19850430; IL 74053 A 19880331; JP H0788345 B2 19950927; JP S60161958 A 19850823; KR 850005404 A 19850826; KR 930004358 B1 19930526; MA 20327 A1 19851001; NZ 210853 A 19870529; PH 20448 A 19870109; TR 22462 A 19870717; US 4544508 A 19851001; ZA 85382 B 19850925; ZW 22384 A1 19850925
DOCDB simple family (application)
EP 85100121 A 19850107; AT 85100121 T 19850107; AU 3776585 A 19850117; BR 8500212 A 19850117; CA 472160 A 19850116; CS 33385 A 19850117; DD 27258485 A 19850115; DE 3401483 A 19840118; DE 3560001 T 19850107; DK 22885 A 19850117; ES 539647 A 19850117; GR 850100124 A 19850116; HU 22785 A 19850118; IL 7405385 A 19850115; JP 345085 A 19850114; KR 850000239 A 19850116; MA 20551 A 19850117; NZ 21085385 A 19850116; PH 31731 A 19850117; TR 213285 A 19850117; US 68975985 A 19850109; ZA 85382 A 19850117; ZW 22384 A 19841224